Vacuum tube



June" 22 1926. i 1,589,483

G. H. PERRYMAN VACUUM TUBE Filed NOV. 5. 1925 Patented June'22, 1926.

UNITED STAT .1,589,483 PATENT oFFica.

GEORGE H. PERRYMAN, OF NEW YORK, N. Y., ASSIGNOR 'IO PERRYNAN ELECTRIC COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

VACUUM TUBE.

Application filed November This invention relates to an impro-` fuient in a vacuum tube intended particularly for radio purposes and has for its ob'ject to pro- -vide a tube of this character in which the various internal elements or parts will be strongly reinforced and held together so that the electrical" characteristics of the tube will not be changed by the shifting of the parts relative to one another by reason of rough j .v handling or'use.

A further object of this invention is to provide a reinforcing or bracing means for the parts of a vacuum tube so that said parts Reference is to be had to the accompany- 25 ing drawings, forming a part hereof in which- Figure -1 is a front elevation of the interiorarts of the. tube, certain parts being shown" 1n section to disclose construction; Figure 2 is a plan view of the same;

Figure 3 is a perspective view of the upper Vbracing strip; and

Figure 4 is an end view of parts of the tube.

Throughout the various views of the drawings similar parts.

In-the tion, 1 in icates the tube base or stem which is preferably of glass and which, in the usual vconstruction `of tubes extends downwardl and unites with the usual glass enclosure shell which has been omitted from the drawing. The stem or base 1 is moulded about and holds upwardly extending wires or rods 2 which carry the usual enclosing plate member 3.v

At 4 are shown a air of wires which roject-upward out o the base 1, and t BSB wires 4 are splayed outwardly and are fused to upwardly projecting rods or Wires 8 around which the glrid 5 is wound, vsaid grid being located Wit i 'in vacuum tube construction. At 9' is shown a bracing member which similar reference characters designate.

preferred embodiment of invenp n the'plate 3 as iscustomary 3, 1925. Serial No. 66,553.

may be made of mica or any other desired insu'lating material and this strip acts as a supporting and bracing member for the various tube elements. Said strip 9 is provided With perforations 16 through which the plate-supporting Wires 2 extend upwardly and it is also provided wi-th a pair of perforations 15 through which the gridsupports 8 extend. Said strip 9 is also provided with a pair of perforations 17 through which wires 6 extend, said Wires 6 projecting upward and out of the base 1 in which they are anchored.

It will be seen that the brace member 9 rests upon the outwardly splayed ends of the wires 4 and it is held thereon by the plate 3 whose lower edge rests upon the upper face ,f

of the strip 9.r4

At 10 is shown a similar bracing strip which is located atthe upper ends of the 'various wires and said strip is rovided with the various perforations 15 an 16 toreceive the upper ends of the wires 8 and 2.

' Itis noted that thewires 2' are projected slightly beyond the upper face of the strip 10 so thatsaid projecting ends may be bent over to hold `the strip 10 down upon the upper end of the plate 3 and prevent the strip 10 from being. detached.

In the strip 10 1s located a central erforation through which a wire forme on the end of the .coil spring 11 pro'ects. Said vwire terminates in a hook 12 w ich acts to engage and resiliently su port the u r end of the filament 7. p Ppe n will be noted that the' spring 11', which is an inverse coil spring, rests upon the-uper face of the bracing strip-10.

It will beapparent from the foregoing that through the use of the bracing strips 9 and 10, an extremelysecure and rigid construction is afforded. The plate 3 is securely held between. the strips 9 and 10 and has its opposite ends abutting against said strips and holds them apart. The various wires which support the rid, the plate and the -filament pass throug suitable perforations in the strips 9 and 10 with the result that said wires, are'always held accurately vs aced from one another and cannot shift or c angle;x their relative positions by rough hand g or abuse of the tube..v l

Having' described one embodiment of my invention, itis obvious that-.the same is not to be restricted thereto, but is broad enough to cover all structures comingv within the `scope of the annexed claims.

Having described my invention, what I claim is:

1. In an article of the class described, a base, a pair of plate supportingl wires extending therefrom,l grid supporting wires extendlng therefrom and filamentv supporting wires extending therefrom, a strip of insulating material located ad'aoent said base, said strip having a plurality of perforatins through which the various wires project, said strip resting upon and supported by partsof the grid-supporting wlres,

an upper strip of insulating material at the ends of the various wires, the ends of someof said wires being bent over on the upper face of said strip so that said up er stri rests upon the upper end of the p ate, an means held upon said upper strip for engafring and resiliently supporting the upper en of the filament.

. 2. In an article of the class described, a. base, plate su porting wires extending upwardly there om, a plate carried on said wires, grid-supporting wires extendin from said base, said grid-supporting wires aving outwardly splayed portions on which a strip of insulating material rests`and an upper strip of insulating material through which the plate-supportm wires and grid-supporting wires exten said upper strip resting on to of the upper edge of the plate and held t ereon.

3. In ak vacuum tube, the combination with a base, plate-supporting wires extendporting wires, said strips each having apair of openingsthr'ough which thefgrd-supportling wires extend and also having another pair of openings through which the platesupporting wires extend, a plate carried upon the plate-supporting wires and enclosing the grid and filament, said plate having its lower end resting upon the u per face of one of the insulating strips an having its upper end bearing against the lower face of the other insulatingstrip whereby said insulating strips are maintained in spaced? apart relationship.

Signed at New York cit in the county of New York, and State o New York.

GEORGE H. PERarianna. i 

